David Whitehouse, MD

Amy Gonzalez is a board certified Psychiatric Mental Health Nurse Practitioner as well as a Family Nurse Practitioner. She has been practicing in the field of nursing since 1996. Amy has been a practicing Family Nurse Practitioner since 2007, and she started to focus on substance abuse treatment in 2010. She found that many people with substance use disorder also struggle with their mental health and went on to get her Psychiatric Mental Health Nurse Practitioner degree completing it in 2017. Her past experience includes working in both outpatient and inpatient psychiatry, 24-hour crisis care, substance use treatment, mental health court, and both adult and geriatric psychiatry. Amy has expertise in treating depression, bipolar spectrum disorder, anxiety, insomnia, PTSD, substance use disorders and thought disorders.

Amy believes in providing a safe and supportive environment where she really gets to know her patients as individuals and works collaboratively with them to develop a treatment plan. She is concerned with a patient's overall wellness, emphasizing nutrition, movement, hobbies, social connection, and mindfulness. She takes a holistic approach to treatment which focuses on evidence-based treatments including conventional medications, supplements, and alternative and complementary treatments.

Amy focuses on medication management as well as providing supportive therapy, psychoeducation, and motivational interviewing to her patients in 30-minute follow up appointments. Sometimes Amy may recommend more intense therapy and ask that you bring a therapist into your care team to provide the best outcome.

Dr. Alexandra Hamlyn is a board-certified adult psychiatrist and board-certified child and adolescent psychiatrist. She completed her medical education at Cooper Medical School of Rowan University and then completed her residency in adult psychiatry at Icahn School of Medicine at Mount Sinai Beth Israel. She then went on to complete her child and adolescent psychiatry fellowship at NYU Langone and Bellevue Hospital. During this time, she also taught a course titled Love Actually at NYU School of Arts and Science. During training, Dr. Hamlyn gained extensive clinical experience in psychiatric inpatient, outpatient, and emergency settings, allowing her the opportunity to treat patients of all ages and backgrounds in numerous busy hospitals in New York City. Dr. Hamlyn's primary focus is on medication management, though she also has experience working in four different outpatient clinics where she has gained expertise in multiple different therapy modalities. If appropriate, Dr. Hamlyn will refer you for psychotherapy and collaborate with your therapist to support your care. She appreciates the importance of fostering a meaningful therapeutic relationship, and her goal is to make every patient feel welcomed in a non-judgmental treatment environment. She also takes a holistic approach as she understands that good health creates a sense of overall well-being and improved mental health. She strongly emphasizes the importance of mindfulness, self-compassion, exercise, nutrition, and interpersonal relationships throughout treatment. She looks forward to meeting and working with you.

Dr. Caleb Cheatham is a board-certified psychiatrist who completed his undergraduate studies at Stetson University in DeLand, FL, before earning his medical degree and completing his psychiatry residency at the University of Tennessee Health Science Center in Memphis, TN. He brings a strong foundation in psychopharmacology and a deep commitment to person-centered care.

Dr. Cheatham takes an open, nonjudgmental approach and strives to create a safe space for patients to share vulnerably. He believes in leading with compassion and listening as a core tool for understanding. His treatment philosophy is integrative—combining thoughtful medication management with supportive, individualized therapy—and he encourages patients to consider the role of lifestyle factors like sleep, nutrition, and exercise.

Dr. Cheatham begins with a conversational consultation focused on understanding each patient’s story and needs. Together, they co-create a personalized treatment plan grounded in the patient’s values. He emphasizes clear communication and routinely revisits treatment goals to ensure alignment, progress, and ongoing support.

Dr. Sara Mateo holds the position of staff Psychiatrist at Talkiatry. She is a board-eligible adult Psychiatrist. Dr. Mateo completed her Medical degree at the University of Benghazi- Faculty of Medicine and finished General Psychiatry Residency training at Tower Health/DrexelPhoenixville Hospital. Throughout her career, Dr. Mateo has actively contributed to various leadership roles and committees, demonstrating her commitment to advancing medical education and promoting diversity in the field. During her training, she generously shared her knowledge through educational presentations and lectures, fostering the growth of fellow trainees and medical students. Dr. Mateo is dedicated to creating a therapeutic environment characterized by warmth, empathy, and nonjudgmental support. Her approach involves collaborating with patients to develop individualized treatment plans that consider cultural, biological, psychological, and social factors. With a primary focus on medication management, Dr. Mateo's keen interest in psychotherapy is evident, as she often integrates supportive therapy, cognitive behavioral therapy, and psychodynamic psychotherapy during 30-minute follow-up visits to optimize wellness and recovery. Dr. Mateo brings a wealth of experience in caring for individuals of diverse ages and backgrounds, adeptly addressing a wide spectrum of conditions. Her expertise extends to treating depressive disorders, bipolar disorders, anxiety disorders, trauma and stress related disorders, ADHD, OCD, Insomnia, psychotic disorders; she also has experience treating individuals with medical comorbidities.

Dr. Tim Kelly is a board-certified psychiatrist who specializes in adult psychiatry. His practice focuses primarily on medication management but often incorporates aspects of supportive, psychodynamic, and cognitive behavioral therapies into his 30-minute follow-up visits. Dr. Kelly also strongly believes in working in conjunction with therapists to achieve the best possible outcomes for his patients. He feels it is important to create strong therapeutic relationships with his patients in order to help patients achieve their treatment goals. Dr. Kelly received his undergraduate degrees in Human Biology and Spanish from Michigan State University. He then completed his medical education and a master's degree in medical humanities and bioethics at Northwestern University. He completed his adult psychiatry residency at the University of Washington. He has authored papers in medical education and LGBTQ advocacy. Dr. Kelly now lives in Pennsylvania with his husband, Kevin, and three dogs: Taquito, Fergie and Mimi. While Dr. Kelly treats adults of all backgrounds, he has a particular interest in working with young adults, students, and LGBTQ individuals.‍

Dr. Gregory Marc Varhely is a board-certified general adult psychiatrist. He grew up in Austin, Texas, and attended Texas State University, where he earned a BA in Psychology and a Master's degree in Biology/Biochemistry. After graduating from medical school at Ross University, he completed his residency in Psychiatry at the Medical College of Wisconsin. Dr. Varhely has served as an outpatient psychiatrist at the Department of Veterans Affairs and acted as an attending physician for resident psychiatrists at Texas A&M and UT Dell Medical Schools. He then acted as a sole proprietor of an outpatient psychiatric medication management and psychotherapy practice in Georgetown, Texas and later started contracting for North Central Health Care Mental Health Clinic, applying psychotropic medication management expertise to community-based treatment facilities in Wisconsin. Dr. Varhely's approach is rooted in forming meaningful connections with his patients. He wholeheartedly believes that psychological suffering stems from a blend of biological, psychological, social, and environmental factors. Dr. Varhely works together with his patients to uncover these factors and create treatment plans tailored to their specific needs using an eclectic blend of the latest in psychopharmacology, as well as psychodynamic, supportive, and cognitive-behavioral therapy.